transaction rolled back because is has been marked as rollback-only

"Transaction rolled back because it has been marked as rollback-only"是一个异常，它意味着事务被标记为仅回滚。这种异常通常发生在事务处理过程中，当某些条件触发将事务标记为回滚时，事务管理器会抛出这个异常。具体原因可能有多种，下面是一些可能导致这个异常的原因：

1. 在代码中明确将事务标记为回滚: 可能在代码中显式调用了`setRollbackOnly()`方法，将事务标记为回滚状态。这可能是因为某些业务逻辑或异常处理逻辑导致的。

2. 事务嵌套: 在一个事务内部嵌套了另一个事务，并在内部事务中将其标记为回滚。这种情况下，外部事务也会被回滚。

3. 异常处理: 在代码中使用了try-catch块来处理异常，并在catch块内将事务标记为回滚。这种情况下，即使事务不是因为异常而回滚，也会被标记为回滚。

解决这个异常的方法主要取决于具体的情况。如果是因为明确将事务标记为回滚导致的，可以检查代码中是否有必要将事务标记为回滚或者尝试调整业务逻辑。如果是因为事务嵌套或异常处理导致的，可以尝试调整事务的嵌套方式或异常处理逻辑。

总之，"Transaction rolled back because it has been marked as rollback-only"异常表示事务被标记为回滚，并且可能有多种原因导致这种情况发生。根据具体情况进行分析和解决即可。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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